Unregistering .CHM files

Compiled Microsoft HTML Help files (.CHM) may need to be registered if they are used with applications (depending on how your developer has designed the application). If your developer rewrites the application so the .CHM no longer needs to be registered, you'll need to unregister your .CHM file. You may also want to unregister a .CHM file when you or your developer cleans up your registry.

Note: The process of unregistering a .CHM file takes place on your authoring system and is not related to how users view your Help project after it's distributed.

To unregister a .CHM file:

  1. From the Tools tab, double-click HTML Help Registration.

The HTML Help Registration dialog opens. All .CHM files that are registered on your Help authoring system are identified.

  1. Select the .CHM file you need to unregister.

  2. Click Unregister.

  3. To save the changes you made to the registry, click OK.

  4. To cancel the changes you made to the registry, click Cancel.